Re: Recovery from online backup
> Contrary to its syntax, this command does not
actually backup the
> controlfile. Rather, it creates a trace file
with the commands to recreate
> the controlfile.
Backup and Recovery Concepts Release
statement ALTER DATABASE BACKUP CONTROLFILE makes a binary backup of the control
statement ALTER DATABASE BACKUP CONTROLFILE TO TRACE exports the control file
contents to a SQL script file. You can use the script to create a new control
file. Trace file backups have one major disadvantage: they contain no records of
archived redo logs, offline ranges for datafiles, and RMAN backups and copies.
For this reason, binary backups are preferable